Pica Dry Refill Leads Set Various Colors, 8PK includes eight pre-sharpened leads stored in a convenient plastic box with a two-piece wing lid for easy access. This set features four graphite leads, two red, and two yellow, making it versatile for marking on a wide range of surfaces, whether dry or wet, glossy or rough, dusty or oily, bright or dark. The leads can be easily wiped away from glossy surfaces with a damp cloth. To maintain the quality of the red and yellow leads, it is to keep them away from temperatures exceeding 86 degrees Fahrenheit (30 degrees Celsius). Each lead measures 2.8mm in diameter and 125mm in length, ensuring precision and durability for various marking needs. Model Number: 4020